unit circle In the plane, the unit circle is the circle of radius 1 with its centre at the origin. In Cartesian coordinates, it has equation x2 + y2 = 1. In the complex plane, it represents those complex numbers z such that |z| = 1.
unit circle
数学辞典收录了4151条数学词条，基本涵盖了常用数学知识及数学英语单词词组的翻译及用法，是数学学习的有利工具。